FILE - This combo of file photos shows South Dakota U.S. Senate candidates, from left: Republican Mike Rounds; independent Larry Pressler; Democrat Rick Weiland, and independent Gordon Howie. Neither Democrat Weiland nor Republican-turned-independent Pressler has kept pace with Rounds’ fundraising in the race. But Rounds has failed to pull away, dogged by a fresh focus on his tenure as governor, an office he held from 2003 to 2011. Also running is Howie, a former state senator with tea party support. (AP Photo/File)
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